Dibenzocyclooctadiene compounds



United States Patent 3,472,869 DIBENZOCYCLOOCTADIENE COMPOUNDS Leslie G. Humber, Dollard des Ormeaux, Quebec, Canada, assignor to American Home Products Corporation,

New York, N.Y., a corporation of Delaware No Drawing. Filed Aug. 10,1966, Ser. No. 571,439

Int. Cl. C07d 27/02, 63/12, 31/32 US. Cl. 260-3265 15 Claims This application is a continuation-in-part of my copending application, Ser. No. 464,183, filed June 15, 1965, now US. Patent No. 3,317,543.

This invention relates to certain novel derivatives of 2,3,6,7-dibenzo-2,6-cyclooctadiene, containing substituents in the 1-position. These derivatives possess valuable pharmacological properties and this invention also relates to a process for the preparation of said derivatives.

The new pharmacologically active compounds of this invention may be represented by the generic structural Formula I.

wherein X may be where Y may be an aromatic moiety such as, for example, phenyl, pyridyl, pyrazinyl, thienyl, or furyl and Z is a lower aminoalkyl, lower'alkylaminoalkyl, lower dialkylamino or a pyrrolidino-lower alkyl'group, containing from three to twenty carbon atoms, and wherein M represents a valency bond or the methylene group.

More particularly, the compounds of my invention to which this continuation-in-part application is directed are those of the formula X Y I.

wherein X may be CC2 v and HO/ R H -R- R wherein R represents the Z-dimethylaminomethylphenyl, 4 dimethylaminophenyl, 2 dimethylaminomethylbenzyl, or the 2-pyrrolidinomethylphenyl group.

The dibenzocyclooctadiene derivatives of this invention are basic in nature and form acid addition salts. Such salts withpharmacologically acceptable acids are biologically equivalent to the free base. The compounds of this invention are useful as antiinflammatory, antibacterial, trichomonicidal and antigonadotrophic agents.

The compounds of this invention may be administered orally,,by injection, or topically. For oral administration they may be formulated with excipients such as, starch, lactose, magnesium silicate and magnesium stearate in the form of tabletsor capsules containing from 5-500 mg. of the active ingredient. Such tablets or capsules may be administered up to five times per day.

For injection, the free bases'of this invention may be dissolved under sterile conditions in oily vehicles such as, for example, sesame oil or olive oil, at concentrationsof from 1 to 20 mg./ml.

3,472,869 Patented Oct. 14, 1969 For topical administration the compounds of this invention may be formulated in the form of creams, ointments, jellies, lotions or dusting powders, containing from 0.1 to 1 percent of the active ingredient.

The compounds of this invention are conveniently prepared by reacting compound I with X=-COCH (Leonard et al., I. Am. Chem. Soc. 77, 5078 (1955)) with a compound of the formula MY-Z in the presence of a suitable basic condensing agent such as, for example, an alkali metal amide, alkoxide, alkyl, or aryl, to yield the corresponding l-hydroxy derivatives of Formula I in which X represents the group II.

Alternatively, the compounds of this invention in which X represents the group II may also be prepared by reacting the compound of Formula I in which with a Grignard reagent prepared from a halo derivative of M-YZ, of the formula Ha1MY-Z in which Hal represents a halogen with an atomic weight greater than 19.

The latter compounds may be treated with an appropriate dehydrating agent such as, for example, a mineral acid or an organic anhydride, to yield the corresponding olefins of Formula I in which X represents the group IV, and the latter compounds may be hydrogenated, for example, with hydrogen in the presence of a noble metal catalyst to yield the saturated compounds of Formula I in which X represents the group III.

Alternatively, the last-named compounds may be obtained directly from the compounds of Formula I in which X represents the group II by treatment with a suitable hydrogenolyzing agent such as, for example, hydrogen iodide and red phosphorus, or hydrogen in the presence of a noble metal catalyst.

The compounds of generic Formula I may be transformed to salts by reacting them with a pharmacologically acceptable. acid.

The examples which follow serv to illustrate my invention.

EXAMPLE 1 l-hydroxy- 1 (Z-dimethylaminoethylphenyl) -2,3 ,6,7- dibenzo-2,6-cyclooctadiene Benzyldimethylamine (5.06 gm., 0.037 mole) is lithiated in the ortho position with butyl lithium (0.45 mole) in ether with stirring at room temperature for 24 hours. The resulting mixture is added over one half hour to a refluxing ether solution ml.) of 2,3,6,7-dibenzo-2,6- cyclooctadienone (11.0 gm., 0.0495 mole). The reaction mixture is worked up in the conventional manner to yield some non-basic material identified as the starting ketone. The basic fraction is a mixture of starting amine and title compound as indicated by thin layer chromatography. The title compound is separated by crystallization from a chloroform-ether mixture to be obtained as a solid with M.P. 196-197 C. recrystallized from chloroform-ether to M.P. l97-198 C.

EXAMPLE 2 1- (2-dimethylaminomethylphenyl) -2, 3 ,6,7-dibenzo- 2,6,8-cyclooctatriene 1 hydroxy-l-(2-dimethylaminomethylphenyl)-2,3,6,7- dibenzo-Z,6-cyclooctadiene (15 gm.), obtained as in Example l, is dissolved in acetic :anhydride ml.) and heated to reflux for three hours. The mixture is cooled and 0 added slowly to ice-cold aqueous sodium hydroxide. The

3 EXAMPLE 3 1-( 2-dimethylaminomethylphenyl) -2,3,7-dibenzo-2,6- cyclooctadiene The compounds obtained in Examples 1, 2 and 3 are treated in ether solution with hydrogen chloride to obtain the corresponding hydrochloride salts of l-hydroxy- 1 (2 dimethylaminomethylphenyl)-2,3,6,7-dibenzo-2,6- cyclooctadiene, 1-(2-dimethylaminomethylphenyl)-2,3,6, 7-dibenz0-2,6,8-cyclooctatriene, and I-(Z-dimethylaminomethylphenyl)-2,3,7-dibenzo-2,6-cyclooctadiene.

EXAMPLE 5 l-hydroxy-l- (2-dimethylaminomethylbenzyl) -2,3,6,7- dibenzo-2,6-cyclooctadiene 2-(dimethylaminomethyl)-toluene (17.90 gm., 0.12 mole), dissolved in ether (250 ml.), is treated with nbutyl lithium (84.6 ml. of a 1.7 N solution in heptane) and the mixture is allowed to remain at room temperature overnight. To the resultant suspension of 2-(dimethylaminomethy1)-benzyl lithium in refluxing ether is added over 30 minutes, 2,3,6,7-dibenzo[2,6]cyclooctadiene-lone (1780 gm., 0.08 mole) dissolved in 200 ml. of ether. Refiuxing is continued for two hours, then 200 ml. of water is added. The ether phase is separated, washed with water, treated with charcoal and dried with sodium sulfate. Concentration of the ether extracts and crystallization from acetone yields the product, M.P. 120-123 C. Its empirical formula C H NO is confirmed by elemental analysis.

EXAMPLE 6 1-hydroxy-1-( 2-pyyrolidinomethylphenyl)-2,3,6,7- dibenzo-2,6-cyclooctadiene N-benzylpyrrolidine (29.1 gm., 0.18 mole) in ether (200 ml.) is treated with n-butyl lithium (126.9 ml. of a 1.7 N solution in heptane) and the mixture is kept at room temperature for 16 hours. To this solution is added at room temperature 2,3,6,7-dibenzo[2,6]cyclooctadienel-one (26.7 gm., 0.12 mole) in 250 ml. of ether over a period of 60 minutes. The reaction mixture is then refluxed for 2.5 hours, then cooled, and treated with 300 ml. of water. The organic phase is separated, washed, dried, (Na SO and evaporated to yield a residue which is crystallized from an acetone-hexane mixture to give the product, M.P. l65166 C. The empirical formula C H NO is confirmed by empirical analysis.

EXAMPLE 7 1-(4-dimethylaminophenyl) -2,3,6,7-dibenzo- 2,6,8-cyclooctatriene p-Bromo-N,N-dimethylaniline (20.0 gm., 0.1 mole) in tetrahydrofuran (120 ml.) is added to magnesium (2.44 gm., 0.1 mole) in tetrahydrofuran .(40 ml.) containing a catalytic amount of ethyl bromide. The Grignard mixture is refluxed for 2 hours, cooled and treated dropwise with a solution of 2,3,6,7-dibenzo[2,6]cyclooctadiene-l-one (22.2 gm., 0.1 mole) in tetrahydrofuran (120 ml The mixture is refluxed for 2 hours, cooled and treated with saturated aqueous ammonium chloride solution (70 ml.). The tetrahydrofuran phase is concentrated and treated with excess ethereal hydrogen chloride to yield the hydrochloride salt of the product, M.P. 209-210 C. when crystallized from ethanol. The product, in the form of the free base, is obtained from the salt by conventional procedures. It has M.P. 120-1225 C. and its empirical formula C H N is confirmed by analysis.

EXAMPLE 8 l-(2-dimethylaminomethylbenzyl -2,3,6,7- dibenzo-2,6,8-cyclooctatriene l-hydroxy-l-(Z-dimethylaminomethylbenzyl) 2,3,6,7- dibenzo-2,6-cyclooctadiene (8.0 gm., 0.022 mole) is refluxed in a mixture of acetic acid (120 ml.) and concentrated hydrochloric acid (12 ml.) for 3 hours. The solvents are removed in vacuo and the residue is distributed between chloroform and 10% aqueous sodium hydroxide. The chloroform phase yields the product, M.P. l-200 C., from ethanol. The hydrochloride salt is prepared with ethereal hydrogen chloride. It has M.P. 2l7.5-2l8 C., from ethanol, and its empirical formula C H CIN is confirmed by elemental analysis.

EXAMPLE 9 l- (2-pyrrolidinomethylphenyl)-2,3,6,7- dibenzo-2,6,8-cyclooctatriene X wherein X is selected from the group which consists of C-CH; and

and R is selected from the group consisting of Z-dimethylaminomethylphenyl, 4-dimethylaminophenyl, Z-dimethylaminoethylbenzyl and 2-pyrrolidinomethylphenyl; and their hydrochloride salts.

2. l hydroxy 1 (2 dimethylaminomethylphenyl)- 2,3,6,7-dibenzo-2,6-cyclooctadiene, as claimed in claim 1.

3. l (2 dimethylaminomethylphenyl) 2,3,6,7 dibenzo-2,6,8-cyclooctatriene, as claimed in claim 1.

4. 1 (2 dimethylaminomethylphenyl) 2,3,6,7 di benzo-2,6-cyclooctadiene, as claimed in claim 1.

5. l hydroxy l (2 dimethylaminomethylbenzyl) 2,3,6,7-dibenzo-2,6-cyclooctadiene,'as claimed in claim 1 6. 1 hydroxy 1 (2 pyrrolidinomethylphenyl) 2,3,6,7-dibenzo-2,6-cyclooctadiene, as claimed in claim 1.

7. l (4 dimethylaminophenyl) 2,3,6,7 dibenzo- 2,6,8-cyclooctatriene, as claimed in claim 1.

8. 1 (2 dimethylaminomethylbenzyl) 2,3,6,7-dibenzo-2,6,8-cyclooctatriene, as claimed in claim 1.

9. l (2 pyrrolidinomethylphenyl) 2,3,6,7 dibenzo- 2,6,8-cyclooctatriene, as claimed in claim 1.

10. The hydrochloride salt of l-hydroxy-l-(Z-dimethylaminomethylphenyl) 2,3,6,7 dibenzo 2,6 cyclooctadiene, as claimed in claim 1.

11. The hydrochloride salt of I-(Z-dimethylaminomethylphenyl)-2,3,6,7-dibenzo 2,6,8 cyclooctatriene, as claimed in claim 1.

12. The hydrochloride salt of l-(2-dimethylaminomethylphenyl)-2,3,6,7-dibenzo 2,6 cyclooctadiene, as claimed in claim 1.

5 6 13. The hydrochloride salt of 1-(4-dirnethylamino- References Cited phenyl)-2,3,6,7-dibenz0-2,6,8-cyclooctatriene, as claimed UNITED STATES PATENTS in claim 1.

3,389,177 6/1968 Adank et al. 260570.8 14. The hydrochloride salt of 1-(2-dimethy1aminomethylbenzyl)-2,3,6,7-dibenzo-2,6,8-cyclooctatriene, as 5 ALEX MAZEL Pnmary Exammer claimed in claim 1 I. A. NARCAVAGE, Assistant Examiner 15. The hydrochloride salt of 1-(2-pyrrolidinomethyl- US. Cl. X.R. phenyl)-2,3,6,7-dibenzo-2,6,S-cyclooctatriene, as claimed 260 250 290 29 297 32 1 329 3323 34 1 347] in claim 1. 10 570.8, 570.9, 571, 576; 424-250, 263, 274, 275, 285, 330 

1. A COMPOUND SELECTED FROM THE GROUP WHICH CONSISTS OF COMPOUNDS OF THE FORMULA 